From the description, I think this fix is as yet incomplete; the new, binary-incompatible wxwidgets2.8 package should also declare a Breaks: against the versions of the packages that are broken by this, so that pulling in the SRU of wxwidgets2.8 without (for whatever reason) also pulling in the other SRUs doesn't leave users with silently-broken applications.
From the description, I think this fix is as yet incomplete; the new, binary-incompatible wxwidgets2.8 package should also declare a Breaks: against the versions of the packages that are broken by this, so that pulling in the SRU of wxwidgets2.8 without (for whatever reason) also pulling in the other SRUs doesn't leave users with silently-broken applications.